How does browser work with expiration headers, cache-control headers, last-modified-header?

Question

I am a web developer, have worked with PHP and .NET both. having over a year of experience working on web I haven\'t been able to understand the browser caching features thoroug

Answer 1

With CSS files a standard "workaround" is to incrementally add a parameter to a link:

...

This will force a browser to reload the file.